Pyelonephritis can not be seen by ultrasound, pyelonephritis can not be clearly diagnosed only by ultrasound, but also need to be combined with the patient’s symptoms, urine routine, urine culture, blood routine, renal function and other laboratory tests. 1. Symptoms: Pyelonephritis is a bacterial infection, which leads to fever, chills, low back pain and other symptoms, and some patients also have frequent urination, urinary urgency, urinary pain and other symptoms of lower urinary tract infection. 2. Urine routine: patients should take urine routine to know whether the white blood cells and red blood cells are elevated, if elevated, it can indicate pyelonephritis. 3. Urine culture: through the urine culture to find the causative bacteria, clear use of sensitive antibiotic treatment. 4. Blood routine: through the blood routine to know whether there are elevated white blood cells, neutrophilic granulocytosis, decreased hemoglobin, etc., to determine whether there are infections, anemia and other conditions. Usually, the white blood cell count of patients with acute pyelonephritis is elevated, neutrophils are increased and monocytes are shifted to the left. 5. Renal function: renal function is performed to find out whether creatinine is elevated and glomerular filtration rate is decreased to support the diagnosis. Chronic pyelonephritis patients with impaired renal function may have elevated creatinine and decreased glomerular filtration rate. Although urinary ultrasound cannot clarify pyelonephritis, tests are still needed to exclude other diseases such as urinary stones and renal space-occupying lesions. It is recommended that patients under the guidance of the doctor for examination, clear diagnosis and active treatment.